公开(公告)号：US20220316528A1

公开(公告)日：2022-10-06

申请号：US17419950

申请日：2020-04-27

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Yuki KATO ,  Douglas OLSON ,  Brian COYNE

IPC: F16C41/00 ,  F16C33/58 ,  F16C33/60 ,  F16H49/00 ,  F16H1/32

Abstract: A bearing unit is provided with a strain element for torque detection. The strain element is provided with a first annular part attached to a rotation-side member, a second annular part attached to a load-side member, and a plurality of ribs serving as strained parts linking the first annular part and the second annular part together. One of an inner race and an outer race is integrally formed on the first annular part of the strain element. Deformation, which occurs in the ribs of the strain element due to torque exerted on the rotation-side member from the load-side member, is detected by a strain gauge, etc., and converted to torque. The strain element for torque detection can be incorporated into a motor, a reducer, or another rotary propulsion unit without the need for a dedicated installation space and without the need for fastening fittings, etc.

公开(公告)号：US20220381549A1

公开(公告)日：2022-12-01

申请号：US17838922

申请日：2022-06-13

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Brian COYNE ,  Yuki KATOH

IPC: G01B7/30 ,  G01D5/14

Abstract: An exemplary encoder assembly includes a substrate, a first encoder, and a second encoder. The substrate has two or more position sensors, each position sensor being configured for detecting a rotary position of a shaft or other rotating element of a machine. The first encoder includes at least one first position sensor of the two or more position sensors. The at least one first position sensor is disposed on the substrate for off-axis alignment with the shaft or other rotating element of the machine. The second encoder includes a second position sensor of the two or more position sensors, the second position sensor being disposed on the substrate for on-axis or off-axis alignment with the shaft or other rotating element of the machine. Each position sensor is configured to detect different or common signal types, and a signal type of the second position sensor excludes optical signals.

公开(公告)号：US20210310834A1

公开(公告)日：2021-10-07

申请号：US17338799

申请日：2021-06-04

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Brian COYNE ,  Yuki KATOH

IPC: G01D5/249 ,  G01B7/00 ,  G01D5/14

Abstract: An exemplary encoder assembly includes a substrate, a first encoder, and a second encoder. The substrate has two or more position sensors, each position sensor being configured for detecting a rotary position of a shaft or other rotating element of a machine. The first encoder includes at least one first position sensor of the two or more position sensors. The at least one first position sensor is disposed on the substrate for off-axis alignment with the shaft or other rotating element of the machine. The second encoder includes a second position sensor of the two or more position sensors, the second position sensor being disposed on the substrate for on-axis or off-axis alignment with the shaft or other rotating element of the machine. Each position sensor is configured to detect different or common signal types, and a signal type of the second position sensor excludes optical signals.